Solving simultaneous equations for mesh analysis

Hi
Can anybody advise whether there is an online or down-loadable calculator for mesh analysis solving complex notation such as a + jb using determinants and calculating for two or three unknown variables? Thanks in advance.

You'll definitely might want to look at Qalculate, it's a calculator for Linux, i use it on Ubuntu all the time, I managed to overwrite the ABC.. constants that have been programmed into it and I used them as XYZ variables so I can solve any equation that uses ABCD..etc variables.
It solves for values, it factorizes, it simplifies, it's amazing.
I use it only for simple Algebra, but you can definitely solve the complicated stuff in there.